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每日一练 | Data Scientist & Business Analyst & Leetcode 面试题 285

大数据应用  · 公众号  · 大数据  · 2018-01-31 10:24

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自2017年6月15日起,数据应用学院与你一起温习数据科学(DS)和商业分析(BA)领域常见的面试问题。 从2017年10月4号起,每天再为大家分享一道Leetcode算法题。

希望积极寻求相关领域工作的你每天关注我们的问题并且与我们一起思考,我们将会在第二天给出答案。

Day 185

DS Interview Questions

Can you cite some examples where a false negative important than a false positive?

BA Interview Questions

What is the difference between rnorm and runif functions ?

LeetCode Questions


Description:

  • Given a list, rotate the list to the right by k places, where k is non-negative.

Input: 1->2->3->4->5->NULL k=2

Output: 4->5->1->2->3->NULL

欲知答案如何?请见下期分解!

Day 184 答案揭晓

DS Interview Questions

What is confidence interval?


In statistics, a confidence interval is a type of interval estimate that is computed from the observed data. A confidence interval gives an estimated range of values which is likely to include an unknown population parameter, the estimated range being calculated from a given set of sample data.

The confidence level is the frequency (i.e., the proportion) of possible confidence intervals that contain the true value of their corresponding parameter. Confidence intervals consist of a range of values (interval) that act as good estimates of the unknown population parameter.

The desired level of confidence is set by the researcher (not determined by data). Most commonly, the 95% confidence level is used.However, other confidence levels can be used, for example, 90% and 99%.

BA Interview Questions

What will be the output of runif (7)?

It will generate 7 randowm numbers between 0 and 1.


Leetcode Questions

Description:

  • Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.

Input: 1->3->5->null 2->4->6->7->null

Output:1->2->3->4->5->6->7->null







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